| 1 |
kumaneko |
111 |
/* |
| 2 |
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* fs/sakura_mount.c |
| 3 |
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* |
| 4 |
|
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* Implementation of the Domain-Free Mandatory Access Control. |
| 5 |
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* |
| 6 |
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* Copyright (C) 2005-2007 NTT DATA CORPORATION |
| 7 |
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* |
| 8 |
kumaneko |
224 |
* Version: 1.4.1-rc1 2007/05/20 |
| 9 |
kumaneko |
111 |
* |
| 10 |
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* This file is applicable to both 2.4.30 and 2.6.11 and later. |
| 11 |
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* See README.ccs for ChangeLog. |
| 12 |
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* |
| 13 |
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*/ |
| 14 |
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/***** SAKURA Linux start. *****/ |
| 15 |
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| 16 |
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#include <linux/ccs_common.h> |
| 17 |
|
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#include <linux/sakura.h> |
| 18 |
|
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#include <linux/realpath.h> |
| 19 |
|
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) |
| 20 |
|
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#include <linux/namespace.h> |
| 21 |
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#endif |
| 22 |
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| 23 |
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15) |
| 24 |
|
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */ |
| 25 |
|
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#define MS_PRIVATE (1<<18) /* change to private */ |
| 26 |
|
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#define MS_SLAVE (1<<19) /* change to slave */ |
| 27 |
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#define MS_SHARED (1<<20) /* change to shared */ |
| 28 |
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#endif |
| 29 |
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| 30 |
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 31 |
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#include <linux/namei.h> |
| 32 |
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#else |
| 33 |
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static inline void module_put(struct module *module) |
| 34 |
|
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{ |
| 35 |
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if (module) __MOD_DEC_USE_COUNT(module); |
| 36 |
|
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} |
| 37 |
|
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#endif |
| 38 |
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| 39 |
|
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extern const char *ccs_log_level; |
| 40 |
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| 41 |
|
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/***** KEYWORDS for mount restrictions. *****/ |
| 42 |
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| 43 |
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#define MOUNT_BIND_KEYWORD "--bind" /* Allow to call 'mount --bind /source_dir /dest_dir' */ |
| 44 |
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#define MOUNT_MOVE_KEYWORD "--move" /* Allow to call 'mount --move /old_dir /new_dir ' */ |
| 45 |
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#define MOUNT_REMOUNT_KEYWORD "--remount" /* Allow to call 'mount -o remount /dir ' */ |
| 46 |
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#define MOUNT_MAKE_UNBINDABLE_KEYWORD "--make-unbindable" /* Allow to call 'mount --make-unbindable /dir' */ |
| 47 |
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#define MOUNT_MAKE_PRIVATE_KEYWORD "--make-private" /* Allow to call 'mount --make-private /dir' */ |
| 48 |
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#define MOUNT_MAKE_SLAVE_KEYWORD "--make-slave" /* Allow to call 'mount --make-slave /dir' */ |
| 49 |
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#define MOUNT_MAKE_SHARED_KEYWORD "--make-shared" /* Allow to call 'mount --make-shared /dir' */ |
| 50 |
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| 51 |
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/***** The structure for mount restrictions. *****/ |
| 52 |
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| 53 |
kumaneko |
214 |
struct mount_entry { |
| 54 |
kumaneko |
111 |
struct mount_entry *next; |
| 55 |
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const struct path_info *dev_name; |
| 56 |
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const struct path_info *dir_name; |
| 57 |
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const struct path_info *fs_type; |
| 58 |
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unsigned int disabled_options; /* Options to forcefully disable. */ |
| 59 |
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unsigned int enabled_options; /* Options to forcefully enable. */ |
| 60 |
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int is_deleted; |
| 61 |
kumaneko |
214 |
}; |
| 62 |
kumaneko |
111 |
|
| 63 |
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/************************* MOUNT RESTRICTION HANDLER *************************/ |
| 64 |
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| 65 |
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static void ParseMountOptions(char *arg, unsigned int *enabled_options, unsigned int *disabled_options) |
| 66 |
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{ |
| 67 |
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char *sp = arg, *cp; |
| 68 |
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unsigned int enable = 0, disable = 0; |
| 69 |
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while ((cp = strsep(&sp, " ,")) != NULL) { |
| 70 |
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if (strcmp(cp, "rw") == 0) disable |= MS_RDONLY; |
| 71 |
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else if (strcmp(cp, "ro") == 0) enable |= MS_RDONLY; |
| 72 |
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else if (strcmp(cp, "suid") == 0) disable |= MS_NOSUID; |
| 73 |
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else if (strcmp(cp, "nosuid") == 0) enable |= MS_NOSUID; |
| 74 |
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else if (strcmp(cp, "dev") == 0) disable |= MS_NODEV; |
| 75 |
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else if (strcmp(cp, "nodev") == 0) enable |= MS_NODEV; |
| 76 |
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else if (strcmp(cp, "exec") == 0) disable |= MS_NOEXEC; |
| 77 |
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else if (strcmp(cp, "noexec") == 0) enable |= MS_NOEXEC; |
| 78 |
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else if (strcmp(cp, "atime") == 0) disable |= MS_NOATIME; |
| 79 |
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else if (strcmp(cp, "noatime") == 0) enable |= MS_NOATIME; |
| 80 |
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else if (strcmp(cp, "diratime") == 0) disable |= MS_NODIRATIME; |
| 81 |
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else if (strcmp(cp, "nodiratime") == 0) enable |= MS_NODIRATIME; |
| 82 |
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else if (strcmp(cp, "norecurse") == 0) disable |= MS_REC; |
| 83 |
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else if (strcmp(cp, "recurse") == 0) enable |= MS_REC; |
| 84 |
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} |
| 85 |
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*enabled_options = enable; |
| 86 |
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*disabled_options = disable; |
| 87 |
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} |
| 88 |
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| 89 |
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static void MakeMountOptions(char *buffer, const int buffer_len, const unsigned int enabled, const unsigned int disabled) |
| 90 |
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{ |
| 91 |
|
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memset(buffer, 0, buffer_len); |
| 92 |
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if (enabled == 0 && disabled == 0) { |
| 93 |
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snprintf(buffer, buffer_len - 1, "defaults"); |
| 94 |
|
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} else { |
| 95 |
|
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snprintf(buffer, buffer_len - 1, "%s%s%s%s%s%s%s", |
| 96 |
|
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enabled & MS_RDONLY ? "ro " : (disabled & MS_RDONLY ? "rw " : ""), |
| 97 |
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enabled & MS_NOSUID ? "nosuid " : (disabled & MS_NOSUID ? "suid " : ""), |
| 98 |
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enabled & MS_NODEV ? "nodev " : (disabled & MS_NODEV ? "dev " : ""), |
| 99 |
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enabled & MS_NOEXEC ? "noexec " : (disabled & MS_NOEXEC ? "exec " : ""), |
| 100 |
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enabled & MS_NOATIME ? "noatime" : (disabled & MS_NOATIME ? "atime" : ""), |
| 101 |
|
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enabled & MS_NODIRATIME ? "nodiratime " : (disabled & MS_NODIRATIME ? "diratime " : ""), |
| 102 |
|
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enabled & MS_REC ? "recurse " : (disabled & MS_REC ? "norecurse " : "")); |
| 103 |
|
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} |
| 104 |
|
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} |
| 105 |
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|
| 106 |
|
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static void put_filesystem(struct file_system_type *fs) |
| 107 |
|
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{ |
| 108 |
|
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module_put(fs->owner); |
| 109 |
|
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} |
| 110 |
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|
| 111 |
kumaneko |
214 |
static struct mount_entry *mount_list = NULL; |
| 112 |
kumaneko |
111 |
|
| 113 |
|
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static int AddMountACL(const char *dev_name, const char *dir_name, const char *fs_type, const unsigned int enable, const unsigned int disable, const int is_delete) |
| 114 |
|
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{ |
| 115 |
kumaneko |
214 |
struct mount_entry *new_entry, *ptr; |
| 116 |
kumaneko |
111 |
const struct path_info *fs, *dev, *dir; |
| 117 |
|
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static DECLARE_MUTEX(lock); |
| 118 |
|
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int error = -ENOMEM; |
| 119 |
|
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if (enable & disable) return -EINVAL; /* options mismatch. */ |
| 120 |
|
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if ((fs = SaveName(fs_type)) == NULL) return -EINVAL; |
| 121 |
|
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if (!dev_name) dev_name = "<NULL>"; /* Map dev_name to "<NULL>" for if no dev_name given. */ |
| 122 |
|
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if (strcmp(fs->name, MOUNT_REMOUNT_KEYWORD) == 0) dev_name = "any"; /* Fix dev_name to "any" for remount permission. */ |
| 123 |
|
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if (strcmp(fs->name, MOUNT_MAKE_UNBINDABLE_KEYWORD) == 0 || |
| 124 |
|
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strcmp(fs->name, MOUNT_MAKE_PRIVATE_KEYWORD) == 0 || |
| 125 |
|
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strcmp(fs->name, MOUNT_MAKE_SLAVE_KEYWORD) == 0 || |
| 126 |
|
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strcmp(fs->name, MOUNT_MAKE_SHARED_KEYWORD) == 0) dev_name = "any"; |
| 127 |
|
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if (!IsCorrectPath(dev_name, 0, 0, 0, __FUNCTION__) || !IsCorrectPath(dir_name, 1, 0, 1, __FUNCTION__)) return -EINVAL; |
| 128 |
|
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if ((dev = SaveName(dev_name)) == NULL || (dir = SaveName(dir_name)) == NULL) return -ENOMEM; |
| 129 |
|
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down(&lock); |
| 130 |
|
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for (ptr = mount_list; ptr; ptr = ptr->next) { |
| 131 |
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if (pathcmp(ptr->dev_name, dev) || pathcmp(ptr->dir_name, dir) || pathcmp(ptr->fs_type, fs)) continue; |
| 132 |
|
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if (is_delete) { |
| 133 |
|
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if (ptr->disabled_options != disable || ptr->enabled_options != enable) continue; |
| 134 |
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ptr->is_deleted = 1; |
| 135 |
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error = 0; |
| 136 |
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goto out; |
| 137 |
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} else { |
| 138 |
|
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if (ptr->is_deleted) { |
| 139 |
|
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ptr->enabled_options = enable; |
| 140 |
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ptr->disabled_options = disable; |
| 141 |
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ptr->is_deleted = 0; |
| 142 |
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} else { |
| 143 |
|
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if ((ptr->enabled_options & disable) || (ptr->disabled_options | enable)) { |
| 144 |
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error = -EINVAL; goto out; /* options mismatch. */ |
| 145 |
|
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} |
| 146 |
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if ((ptr->enabled_options & enable) == enable && (ptr->disabled_options & disable) == disable) { |
| 147 |
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error = 0; goto out; /* No changes. */ |
| 148 |
|
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} |
| 149 |
|
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ptr->enabled_options |= enable; |
| 150 |
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ptr->disabled_options |= disable; |
| 151 |
|
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} |
| 152 |
|
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error = 0; |
| 153 |
|
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goto update; |
| 154 |
|
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} |
| 155 |
|
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} |
| 156 |
|
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if (is_delete) { |
| 157 |
|
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error = -ENOENT; |
| 158 |
|
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goto out; |
| 159 |
|
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} |
| 160 |
kumaneko |
214 |
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) goto out; |
| 161 |
kumaneko |
111 |
new_entry->dev_name = dev; |
| 162 |
|
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new_entry->dir_name = dir; |
| 163 |
|
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new_entry->fs_type = fs; |
| 164 |
|
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new_entry->enabled_options = enable; |
| 165 |
|
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new_entry->disabled_options = disable; |
| 166 |
|
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mb(); /* Instead of using spinlock. */ |
| 167 |
|
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if ((ptr = mount_list) != NULL) { |
| 168 |
|
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while (ptr->next) ptr = ptr->next; ptr->next = new_entry; |
| 169 |
|
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} else { |
| 170 |
|
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mount_list = new_entry; |
| 171 |
|
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} |
| 172 |
|
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error = 0; |
| 173 |
|
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ptr = new_entry; |
| 174 |
|
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update: |
| 175 |
|
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{ |
| 176 |
|
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struct file_system_type *type = NULL; |
| 177 |
|
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char options[64]; |
| 178 |
|
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MakeMountOptions(options, sizeof(options), ptr->enabled_options, ptr->disabled_options); |
| 179 |
|
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if (strcmp(fs->name, MOUNT_REMOUNT_KEYWORD) == 0) { |
| 180 |
|
|
printk("%sAllow remount %s with options %s.\n", ccs_log_level, dir->name, options); |
| 181 |
|
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} else if (strcmp(fs->name, MOUNT_BIND_KEYWORD) == 0 || strcmp(fs->name, MOUNT_MOVE_KEYWORD) == 0) { |
| 182 |
|
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printk("%sAllow mount %s %s %s\n", ccs_log_level, fs->name, dev->name, dir->name); |
| 183 |
|
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} else if (strcmp(fs->name, MOUNT_MAKE_UNBINDABLE_KEYWORD) == 0 || |
| 184 |
|
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strcmp(fs->name, MOUNT_MAKE_PRIVATE_KEYWORD) == 0 || |
| 185 |
|
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strcmp(fs->name, MOUNT_MAKE_SLAVE_KEYWORD) == 0 || |
| 186 |
|
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strcmp(fs->name, MOUNT_MAKE_SHARED_KEYWORD) == 0) { |
| 187 |
|
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printk("%sAllow mount %s %s with options %s.\n", ccs_log_level, fs->name, dir->name, options); |
| 188 |
|
|
} else if ((type = get_fs_type(fs->name)) != NULL && (type->fs_flags & FS_REQUIRES_DEV) != 0) { |
| 189 |
|
|
printk("%sAllow mount -t %s %s %s with options %s.\n", ccs_log_level, fs->name, dev->name, dir->name, options); |
| 190 |
|
|
} else { |
| 191 |
|
|
printk("%sAllow mount %s on %s with options %s.\n", ccs_log_level, fs->name, dir->name, options); |
| 192 |
|
|
} |
| 193 |
|
|
if (type) put_filesystem(type); |
| 194 |
|
|
} |
| 195 |
|
|
out: |
| 196 |
|
|
up(&lock); |
| 197 |
|
|
return error; |
| 198 |
|
|
} |
| 199 |
|
|
|
| 200 |
|
|
int CheckMountPermission(char *dev_name, char *dir_name, char *type, unsigned long *flags) |
| 201 |
|
|
{ |
| 202 |
|
|
const int is_enforce = CheckCCSEnforce(CCS_SAKURA_RESTRICT_MOUNT); |
| 203 |
|
|
int error_flag = 1; |
| 204 |
|
|
if (!CheckCCSFlags(CCS_SAKURA_RESTRICT_MOUNT)) return 0; |
| 205 |
|
|
if (!type) type = "<NULL>"; |
| 206 |
|
|
if ((*flags & MS_MGC_MSK) == MS_MGC_VAL) *flags &= ~MS_MGC_MSK; |
| 207 |
|
|
switch (*flags & (MS_REMOUNT | MS_MOVE | MS_BIND)) { |
| 208 |
|
|
case MS_REMOUNT: |
| 209 |
|
|
case MS_MOVE: |
| 210 |
|
|
case MS_BIND: |
| 211 |
|
|
case 0: |
| 212 |
|
|
break; |
| 213 |
|
|
default: |
| 214 |
|
|
printk("SAKURA-ERROR: %s%s%sare given for single mount operation.\n", |
| 215 |
|
|
*flags & MS_REMOUNT ? "'remount' " : "", |
| 216 |
|
|
*flags & MS_MOVE ? "'move' " : "", |
| 217 |
|
|
*flags & MS_BIND ? "'bind' " : ""); |
| 218 |
|
|
return -EINVAL; |
| 219 |
|
|
} |
| 220 |
|
|
switch (*flags & (MS_UNBINDABLE | MS_PRIVATE | MS_SLAVE | MS_SHARED)) { |
| 221 |
|
|
case MS_UNBINDABLE: |
| 222 |
|
|
case MS_PRIVATE: |
| 223 |
|
|
case MS_SLAVE: |
| 224 |
|
|
case MS_SHARED: |
| 225 |
|
|
case 0: |
| 226 |
|
|
break; |
| 227 |
|
|
default: |
| 228 |
|
|
printk("SAKURA-ERROR: %s%s%s%sare given for single mount operation.\n", |
| 229 |
|
|
*flags & MS_UNBINDABLE ? "'unbindable' " : "", |
| 230 |
|
|
*flags & MS_PRIVATE ? "'private' " : "", |
| 231 |
|
|
*flags & MS_SLAVE ? "'slave' " : "", |
| 232 |
|
|
*flags & MS_SHARED ? "'shared' " : ""); |
| 233 |
|
|
return -EINVAL; |
| 234 |
|
|
} |
| 235 |
|
|
if (*flags & MS_REMOUNT) { |
| 236 |
|
|
*flags &= ~MS_REMOUNT; |
| 237 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_REMOUNT_KEYWORD, flags); |
| 238 |
|
|
*flags |= MS_REMOUNT; |
| 239 |
|
|
} else if (*flags & MS_MOVE) { |
| 240 |
|
|
*flags &= ~MS_MOVE; |
| 241 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_MOVE_KEYWORD, flags); |
| 242 |
|
|
*flags |= MS_MOVE; |
| 243 |
|
|
} else if (*flags & MS_BIND) { |
| 244 |
|
|
*flags &= ~MS_BIND; |
| 245 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_BIND_KEYWORD, flags); |
| 246 |
|
|
*flags |= MS_BIND; |
| 247 |
|
|
} else if (*flags & MS_UNBINDABLE) { |
| 248 |
|
|
*flags &= ~MS_UNBINDABLE; |
| 249 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_MAKE_UNBINDABLE_KEYWORD, flags); |
| 250 |
|
|
*flags |= MS_UNBINDABLE; |
| 251 |
|
|
} else if (*flags & MS_PRIVATE) { |
| 252 |
|
|
*flags &= ~MS_PRIVATE; |
| 253 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_MAKE_PRIVATE_KEYWORD, flags); |
| 254 |
|
|
*flags |= MS_PRIVATE; |
| 255 |
|
|
} else if (*flags & MS_SLAVE) { |
| 256 |
|
|
*flags &= ~MS_SLAVE; |
| 257 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_MAKE_SLAVE_KEYWORD, flags); |
| 258 |
|
|
*flags |= MS_SLAVE; |
| 259 |
|
|
} else if (*flags & MS_SHARED) { |
| 260 |
|
|
*flags &= ~MS_SHARED; |
| 261 |
|
|
error_flag = CheckMountPermission(dev_name, dir_name, MOUNT_MAKE_SHARED_KEYWORD, flags); |
| 262 |
|
|
*flags |= MS_SHARED; |
| 263 |
|
|
} else { |
| 264 |
|
|
goto normal_mount; |
| 265 |
|
|
} |
| 266 |
|
|
if (error_flag) { |
| 267 |
|
|
if (is_enforce) return -EPERM; |
| 268 |
|
|
return 0; |
| 269 |
|
|
} |
| 270 |
|
|
normal_mount: ; |
| 271 |
|
|
{ |
| 272 |
kumaneko |
214 |
struct mount_entry *ptr; |
| 273 |
kumaneko |
111 |
struct file_system_type *fstype = NULL; |
| 274 |
|
|
const char *requested_dir_name = NULL; |
| 275 |
|
|
const char *requested_dev_name = NULL; |
| 276 |
|
|
struct path_info rdev, rdir; |
| 277 |
|
|
int need_dev = 0; |
| 278 |
|
|
|
| 279 |
|
|
if ((requested_dir_name = realpath(dir_name)) == NULL) goto cleanup; |
| 280 |
|
|
rdir.name = requested_dir_name; |
| 281 |
|
|
fill_path_info(&rdir); |
| 282 |
|
|
|
| 283 |
|
|
/* Compare fs name. */ |
| 284 |
|
|
if (strcmp(type, MOUNT_REMOUNT_KEYWORD) == 0) { |
| 285 |
|
|
/* Needn't to resolve dev_name */ |
| 286 |
|
|
} else if (strcmp(type, MOUNT_MAKE_UNBINDABLE_KEYWORD) == 0 || |
| 287 |
|
|
strcmp(type, MOUNT_MAKE_PRIVATE_KEYWORD) == 0 || |
| 288 |
|
|
strcmp(type, MOUNT_MAKE_SLAVE_KEYWORD) == 0 || |
| 289 |
|
|
strcmp(type, MOUNT_MAKE_SHARED_KEYWORD) == 0) { |
| 290 |
|
|
/* Needn't to resolve dev_name */ |
| 291 |
|
|
} else if (strcmp(type, MOUNT_BIND_KEYWORD) == 0 || strcmp(type, MOUNT_MOVE_KEYWORD) == 0) { |
| 292 |
|
|
if ((requested_dev_name = realpath(dev_name)) == NULL) goto cleanup; |
| 293 |
|
|
rdev.name = requested_dev_name; |
| 294 |
|
|
fill_path_info(&rdev); |
| 295 |
|
|
need_dev = -1; |
| 296 |
|
|
} else if ((fstype = get_fs_type(type)) != NULL) { |
| 297 |
|
|
if (fstype->fs_flags & FS_REQUIRES_DEV) { |
| 298 |
|
|
if ((requested_dev_name = realpath(dev_name)) == NULL) goto cleanup; |
| 299 |
|
|
rdev.name = requested_dev_name; |
| 300 |
|
|
fill_path_info(&rdev); |
| 301 |
|
|
need_dev = 1; |
| 302 |
|
|
} |
| 303 |
|
|
} else { |
| 304 |
|
|
goto cleanup; |
| 305 |
|
|
} |
| 306 |
|
|
for (ptr = mount_list; ptr; ptr = ptr->next) { |
| 307 |
|
|
if (ptr->is_deleted) continue; |
| 308 |
|
|
|
| 309 |
|
|
/* Compare fs name. */ |
| 310 |
|
|
if (strcmp(type, ptr->fs_type->name)) continue; |
| 311 |
|
|
|
| 312 |
|
|
/* Compare mount point. */ |
| 313 |
|
|
if (PathMatchesToPattern(&rdir, ptr->dir_name) == 0) continue; |
| 314 |
|
|
|
| 315 |
|
|
/* Compare device name. */ |
| 316 |
|
|
if (requested_dev_name && PathMatchesToPattern(&rdev, ptr->dev_name) == 0) continue; |
| 317 |
|
|
|
| 318 |
|
|
/* OK. */ |
| 319 |
|
|
error_flag = 0; |
| 320 |
|
|
*flags &= ~ptr->disabled_options; |
| 321 |
|
|
*flags |= ptr->enabled_options; |
| 322 |
|
|
|
| 323 |
|
|
if (need_dev > 0) { |
| 324 |
|
|
printk(KERN_DEBUG "SAKURA-NOTICE: 'mount -t %s %s %s' accepted.\n", type, requested_dev_name, requested_dir_name); |
| 325 |
|
|
} else if (need_dev < 0) { |
| 326 |
|
|
printk(KERN_DEBUG "SAKURA-NOTICE: 'mount %s %s %s' accepted.\n", type, requested_dev_name, requested_dir_name); |
| 327 |
|
|
} else if (strcmp(type, MOUNT_REMOUNT_KEYWORD) == 0) { |
| 328 |
|
|
printk(KERN_DEBUG "SAKURA-NOTICE: 'mount -o remount %s' accepted.\n", requested_dir_name); |
| 329 |
|
|
} else if (strcmp(type, MOUNT_MAKE_UNBINDABLE_KEYWORD) == 0 || |
| 330 |
|
|
strcmp(type, MOUNT_MAKE_PRIVATE_KEYWORD) == 0 || |
| 331 |
|
|
strcmp(type, MOUNT_MAKE_SLAVE_KEYWORD) == 0 || |
| 332 |
|
|
strcmp(type, MOUNT_MAKE_SHARED_KEYWORD) == 0) { |
| 333 |
|
|
printk(KERN_DEBUG "SAKURA-NOTICE: 'mount %s %s' accepted.\n", type, requested_dir_name); |
| 334 |
|
|
} else { |
| 335 |
|
|
printk(KERN_DEBUG "SAKURA-NOTICE: 'mount %s on %s' accepted.\n", type, requested_dir_name); |
| 336 |
|
|
} |
| 337 |
|
|
break; |
| 338 |
|
|
} |
| 339 |
|
|
if (error_flag && !is_enforce && CheckCCSAccept(CCS_SAKURA_RESTRICT_MOUNT)) { |
| 340 |
|
|
AddMountACL(need_dev ? requested_dev_name : dev_name, requested_dir_name, type, 0, 0, 0); |
| 341 |
|
|
UpdateCounter(CCS_UPDATES_COUNTER_SYSTEM_POLICY); |
| 342 |
|
|
} |
| 343 |
|
|
cleanup: |
| 344 |
|
|
if (requested_dev_name) ccs_free(requested_dev_name); |
| 345 |
|
|
if (requested_dir_name) ccs_free(requested_dir_name); |
| 346 |
|
|
if (fstype) put_filesystem(fstype); |
| 347 |
|
|
} |
| 348 |
|
|
|
| 349 |
|
|
if (error_flag) { |
| 350 |
|
|
int error = -EPERM; |
| 351 |
|
|
const int is_enforce = CheckCCSEnforce(CCS_SAKURA_RESTRICT_MOUNT); |
| 352 |
|
|
const char *realname1 = realpath(dev_name), *realname2 = realpath(dir_name), *exename = GetEXE(); |
| 353 |
|
|
if (strcmp(type, MOUNT_REMOUNT_KEYWORD) == 0) { |
| 354 |
|
|
printk("SAKURA-%s: mount -o remount %s (pid=%d:exe=%s): Permission denied.\n", GetMSG(is_enforce), realname2 ? realname2 : dir_name, current->pid, exename); |
| 355 |
|
|
if (is_enforce && CheckSupervisor("# %s is requesting\nmount -o remount %s\n", exename, realname2 ? realname2 : dir_name) == 0) error = 0; |
| 356 |
|
|
} else if (strcmp(type, MOUNT_BIND_KEYWORD) == 0 || strcmp(type, MOUNT_MOVE_KEYWORD) == 0) { |
| 357 |
|
|
printk("SAKURA-%s: mount %s %s %s (pid=%d:exe=%s): Permission denied.\n", GetMSG(is_enforce), type, realname1 ? realname1 : dev_name, realname2 ? realname2 : dir_name, current->pid, exename); |
| 358 |
|
|
if (is_enforce && CheckSupervisor("# %s is requesting\nmount %s %s %s\n", exename, type, realname1 ? realname1 : dev_name, realname2 ? realname2 : dir_name) == 0) error = 0; |
| 359 |
|
|
} else if (strcmp(type, MOUNT_MAKE_UNBINDABLE_KEYWORD) == 0 || |
| 360 |
|
|
strcmp(type, MOUNT_MAKE_PRIVATE_KEYWORD) == 0 || |
| 361 |
|
|
strcmp(type, MOUNT_MAKE_SLAVE_KEYWORD) == 0 || |
| 362 |
|
|
strcmp(type, MOUNT_MAKE_SHARED_KEYWORD) == 0) { |
| 363 |
|
|
printk("SAKURA-%s: mount %s %s (pid=%d:exe=%s): Permission denied.\n", GetMSG(is_enforce), type, realname2 ? realname2 : dir_name, current->pid, exename); |
| 364 |
|
|
if (is_enforce && CheckSupervisor("# %s is requesting\nmount %s %s", exename, type, realname2 ? realname2 : dir_name) == 0) error = 0; |
| 365 |
|
|
} else { |
| 366 |
|
|
printk("SAKURA-%s: mount -t %s %s %s (pid=%d:exe=%s): Permission denied.\n", GetMSG(is_enforce), type, realname1 ? realname1 : dev_name, realname2 ? realname2 : dir_name, current->pid, exename); |
| 367 |
|
|
if (is_enforce && CheckSupervisor("# %s is requesting\nmount -t %s %s %s\n", exename, type, realname1 ? realname1 : dev_name, realname2 ? realname2 : dir_name) == 0) error = 0; |
| 368 |
|
|
} |
| 369 |
|
|
if (exename) ccs_free(exename); |
| 370 |
|
|
if (realname2) ccs_free(realname2); |
| 371 |
|
|
if (realname1) ccs_free(realname1); |
| 372 |
|
|
if (is_enforce) return error; |
| 373 |
|
|
} |
| 374 |
|
|
return 0; |
| 375 |
|
|
} |
| 376 |
kumaneko |
223 |
EXPORT_SYMBOL(CheckMountPermission); |
| 377 |
kumaneko |
111 |
|
| 378 |
|
|
int AddMountPolicy(char *data, const int is_delete) |
| 379 |
|
|
{ |
| 380 |
|
|
char *cp, *cp2; |
| 381 |
|
|
const char *fs, *dev, *dir; |
| 382 |
|
|
unsigned int enable = 0, disable = 0; |
| 383 |
|
|
cp2 = data; if ((cp = strchr(cp2, ' ')) == NULL) return -EINVAL; *cp = '\0'; dev = cp2; |
| 384 |
|
|
cp2 = cp + 1; if ((cp = strchr(cp2, ' ')) == NULL) return -EINVAL; *cp = '\0'; dir = cp2; |
| 385 |
|
|
cp2 = cp + 1; |
| 386 |
|
|
if ((cp = strchr(cp2, ' ')) != NULL) { |
| 387 |
|
|
*cp = '\0'; |
| 388 |
|
|
ParseMountOptions(cp + 1, &enable, &disable); |
| 389 |
|
|
} |
| 390 |
|
|
fs = cp2; |
| 391 |
|
|
return AddMountACL(dev, dir, fs, enable, disable, is_delete); |
| 392 |
|
|
} |
| 393 |
|
|
|
| 394 |
kumaneko |
214 |
int ReadMountPolicy(struct io_buffer *head) |
| 395 |
kumaneko |
111 |
{ |
| 396 |
kumaneko |
214 |
struct mount_entry *ptr = head->read_var2; |
| 397 |
kumaneko |
111 |
if (!ptr) ptr = mount_list; |
| 398 |
|
|
while (ptr) { |
| 399 |
|
|
char options[64]; |
| 400 |
kumaneko |
214 |
head->read_var2 = ptr; |
| 401 |
kumaneko |
111 |
MakeMountOptions(options, sizeof(options), ptr->enabled_options, ptr->disabled_options); |
| 402 |
|
|
if (ptr->is_deleted == 0 && io_printf(head, KEYWORD_ALLOW_MOUNT "%s %s %s %s\n", ptr->dev_name->name, ptr->dir_name->name, ptr->fs_type->name, options)) break; |
| 403 |
|
|
ptr = ptr->next; |
| 404 |
|
|
} |
| 405 |
|
|
return ptr ? -ENOMEM : 0; |
| 406 |
|
|
} |
| 407 |
|
|
|
| 408 |
|
|
/***** SAKURA Linux end. *****/ |
TOMOYO
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